The invention provides a coaxial connector with a switch in which the life property and contact reliability of a movable contact piece portion are improved, which is further miniaturized and low-profiled than the conventional art, and in which the component configuration is simple, and hence the production cost is low. A coaxial connector 1 with a switch is configured by four components of an insulation body 10 having a pedestal portion 11, an external-conductor shell 30 having solder connecting portions, a stationary connect member 40, and a movable connect member 50. The movable connect member 50 has a plate-spring like movable contact piece portion 51 configured by a thin metal plate. The movable contact piece portion is housed in a cantilevered manner inside the body so that a plate width direction is in parallel with a direction of insertion and extraction of a plug pin. A free side end portion 54b laterally passes a part of a plug pin insertion region 15 to elongate to a stationary contact portion 41, and has a plug pin contact portion 57 in the same plane as a movable contact portion 56. In accordance with fitting with a counter connector, a plug pin 100 is elastically contacted with the plug pin contact portion, and the movable contact piece portion is displaced in a direction substantially perpendicular to the direction of insertion and extraction of the plug pin against the spring force, and separated from the stationary contact portion.